Tentering clip



0a. .19, 1931. c. H. RAMSEY 2 0 6,470

TENTERING CLIP Filed July 6, 1936 2 Sheets-Sheet 1 I 7 INVENTOR,

Clifford Famlw ATTORNEY.

Oct. 19, 1937.

c. H. RAMSEY TENTERING CLIP 'Filed July 6, 1956 2 Sheets-Sheet} I IINVENTOR, Cliff; H. 7mm

ATTORNEY.

Patented Oct. 19, 1937 UNITED STATES PATiiNT oFFicE v 3 "Claims.

This invention relates to cloth-gripping devices and especially to thecloth-gripping or tentering clips used in tentering machines, suchusually 7 embodyingwith a cast metal (as iron) frame, a steel or otherharder plate over which the margin of the cloth extends and serving asthe fixed jaw "i of the clip, and .a jawor gatesopivoted in the to theframe in some way/commonly by rivets. But, on account of the vibrationand jarring which the clip constantly undergoes, the fixed jaw- (howeverit may be clamped) works loose so that repairs are constantly necessaryto keep the plate from chattering and also properly'coactive withthe'movable jaw;,and, in addition, if rivets areused, the rivet holes inthe plate permit oil used 25, for lubricating the chain and other partsto work up through them to the upper or cloth-engaged surface of theplate, thus to causestaining of the cloth. According to this inventionthe plate or fixed jaw and frame are joined by a welding mass; and sobecome an .integral structure and are.

3 adapted to remain as such throughout the whole life oftheclip, makingrepairs in so far as the union between the plate and frame is concernednever necessary, the connection between them being moreover such as notto invite access of oil 7 to the cloth-engaged surface of said fixedjaw.

' Since the fixed jaw or plate is of hard metal (steel) the grippingedge portion of the movable jaw should be the same. My invention furtherinvolves a novel construction of the movable jaw comprising a cast bodyand a plate ofharder material (as steel) associated therewith so as toprovide the gripping edge.

In the drawings,

Figs. 1 and 2 are aside elevation and a plan, respectively, of theimproved clip;

Figs. 3 and 4 are similar views, respectively, of its movable jaw inuncompleted form; and

Fig. 5 is a horizontal sectional view of the mold 50 in which themovable jaw is formed and as viewed from above, the edge-forming bladefor such jaw appearing in position in the mold. I

The cast metal frame of the clip includes a 7 base! having the'usualextensions 2 and 3 by N which to connect such frame pivotally to the qUsually the fixed jaw or said-plate'is clamped frames of similar clipsto form an endless chain, ,andalso having the upstanding and forwardlyprojecting movable-jaw support 4 (here as usual comprising apair ofarms) and the forwardly projecting fixed-jaw support 5. In a forked arm6 projecting from a brace 1 connecting the arms of sup ort 4 is pivotedto move in a vertical plane the usual controller 8 for the movable jaw,the same having a slot 8a to be engaged by such jaw and being adapted toenter as usual a slot, as will appear, in the fixed jaw or plate.

The movable jaw or gate is mainly a leverlikebrass casting including aweb 9 having arms 9a and 9b penetrated by a pin III by which such jaw ispivotally carried by the movable-jaw sup port 4, arm 9a being betweenand projecting further than arms 91) so as to be adapted, as the chainof clips moves in its circuit and their movable jaws are normally urgedby gravity to assume the position of Fig. 1, to engage parts of themachine whose function it is to move said jaw to cloth-releasing or openposition, as well known. Projecting inwardly from the web is also theforked arm I I having a roller I la engaged in the slot 8a of controller8.

, So much is the usual construction.

The movable-jaw support 4 (here each arm thereof) is at I2 notched atits forward side and near the base I. The fixed-jaw support is formed atits forward portion with a substantial or thickened-up terminal formingan anvil l3 having a substantially horizontal plane top surface. Jammedin the notches is the rear edge of the fixed jaw l4, being a plate ofpreferably rustless steel, its forward portion resting in face to facecontact with said surface of and its forward edge parallel with theanvil. The anvil is elongated transversely of the frame to at least thesame extent as the movable jaw and the forward edge of the fixed jaw orplate, which is approximately as wide as the anvil is long, forwardlyoverhangs the anvil. Existing in the angle between the under side of theprojecting portion of the plate and the forward side of the anvil andextending substantially the full width of the plate and continuously anduniting such projecting portion of the plate and the anvil is a steelwelding mass I 5. (The anvil is so located that when the movable jaw isclosed position shown, Fig. 1its gripping edge is over the anvil.) Thenotches l2 are slightly depressed relatively to the top surface of theanvil, and the plate, whose portion in contact with said surface ishorizontal, has its remaining or rear portion bent downward somewhatthus to permit the former portion to be machined off when required (aswhen and if it becomes marred by the movable jaw) independently of thelatter portion. The slot in the plate to receive the controller isindicated at Ma.

The construction is such that the cast portion and plate or fixed jaw,as considerable practice has shown, form a structure adapted to remainin effect integral indefinitely, and the plate is without holes over thetable permitting access of oil to the cloth being tentered; further,there is assurance, when the cast portion and plate are united in theway stated, that they are at once firmly united, which is not the caseWhere riveting or other form of clamping is resorted to since in thatcase there may be seeming but not actual binding or at least effectivebinding of the parts tightly together so that when the clip goes intoaction any actual or potential looseness'present initially becomes thecause of increasing looseness and consequent chattering and failure ofthe two jaws to coact properly.

To form the movable jaw or gate a mold is pro vided only the sand a ofwhich, provided with a molding space b, is shown in Fig. 5. Before themetal to form the cast body is poured a flat steel blade 56 is placed inthe mold space as shown, to wit, so that the blade lies in approximatelythe median plane m of theultimate web 9 of the jaw, with both ends lfia=and one long margin 16b buried and so supported in the sand and theremainder of the blade in the mold space, which reaches over as well asunder it as indicated by the dotted outline in Fig. 5. When the metal ispoured and so occupies all the mold space the blade will remain embeddedor cast-in in the web of the jaw as in Fig. 4, or with margin I627projecting from that marginal portion of the Web which in the completedclip is to stand presented toward the fixed jaw and the ends l6aprojecting laterally. Upon removal from the mold the ends ltd aretrimmed away and the jaw is so beveled (as in a double-bevel),preferably affecting both said marginal portion of the web and themargin 16b of the blade, as to develop an acute edge on the blade asshown in Fig. 1; while such edge is generally straight, it may be formedwith notches at intervals as shown at in Fig. 2. The blade is formedinitially with a pair of holes l1. When the pouring is effected some ofthe metal extends through these holes to form as it were integral rivetsI8 which hold the blade securely in the groove in the web which itoccupies. I

I have found that if the blade is initially straight in plan, when thecasting is effected the blade for some reason undergoes bending in itsown plane in such manner that its margin I617 is concave, whereforeexcessive bevelling to produce a straight edge is required; also that ifthe holes I! are disposed near the ends of the blade, when this bendingoccurs the mentioned rivets l 8 forming in the holes undergo forwardstraining and frequently fracture. Hence the blade is preferablyinitially formed as shown in Fig. 5 so that its said edge portion isconvex; and the holes I! are located more or less near the mid-portionof the blade, though spaced apart.

Having thus fully described my invention what I claim is:

1. A tentering clip of the class described including a metalframehaving, with a base, a fixedjaw support projecting forwardly fromthe base and having a transversely elongated terminal arranged directlyto oppose the movable jaw of the clip when such movable jaw is in closedposition and a movable-jaw support projecting upwardly from the base andover the first support and being notched at its forward side near thebase, a metal plate to form the fixed jaw of the clip resting with oneof its broad faces upon said terminal for substantially the fulllongitudinal extent thereof and having a forward edge substantiallyparallel with said terminal and a rear edge snugly engaged in the notchof the movable-jaw support, and a transversely extending welding massuniting said plate and terminal substantially continuously andthroughout the whole co-extent of the terminal and plate.

2. The tentering clip set forth in claim 1 char-' acterized by theforward edge portion of the plate reaching forwardlyof said terminal ina plane and said welding mass occupying the angle between such edgeportion of the plate and the forward surface of said terminal 3 Amovable jaw for a tentering clip com-" prising a cast-metal body havinga terminal web one marginal portion of which is to stand presentedtoward the fixed jaw of the clip, and an CLIFFORD H. RAMSEY.

455: elongated cloth-gripping blade cast-in; and hav-f

